If you do not mind spending the time and $$$ on it, go for it. You say that the body is in fairly good shape except for the usual rear rocker rust. But just keep in mind the $600 purchase price won't seem like such a bargain after youve done all the work needed on it. I took 6 mos looking for my 300D-T, i passed up many rust buckets and sorry cars. I just dont want you to be sorry later on with yours.
Keep the opinions going!!!